DaRascal wrote:And the one thing that worries me about conditional chains is that I hate to spend time diagramming contrapositives that might not even be included in the chain.

Also, you generally will use all the rules and their contrapositives, because the chain itself will have a contrapositve. Nonetheless, drawing contrapositives should be something you practice until you can do it so quickly that the time it takes is meaningless. They happen too often in games and in logical reasoning for this to be a concern.

I had this game(Prep33) today.Chain is a good way to solve this game, but you don't need to make this chain.

1. Organize all rules1) H --> Not G G --> Not H2) J or M --> H Not H --> Not J AND Not M3) W --> G Not G --> Not W4) Not J --> S Not S --> J2. Make 2 groups (Selection / Not Selection)3. Put J/S in Selection group (J or S-or both-should be selected-Inference from Rule 4)4. Put H/G in Not Selection group (H or G or both should NOT be selected-Inference from Rule 1)

That's it...

Also, whenever you have a question, make use of Manhattan LSAT forum...it's awesome!!